Update Travis to use built-in runner instead of Rakefile
Update Travis to use built-in runner instead of Rakefile

See https://github.com/venmo/slather/issues/69#issuecomment-95368433

lapfelix/IntentKit,lapfelix/IntentKit,intentkit/IntentKit,sujeking/IntentKit,sujeking/IntentKit,intentkit/IntentKit